I would also like to add to this excellent piece of witnessing the fact that, as perfect people, our judgment is
infallible, and that we can't possibly be wrong about anything whatsoever.
Let's take a look at the Second Epistle to the Corinthians:
1 Corinthians 2:10-11:
But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God. For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
We have received the Holy Spirit, which searches all things, even the deep things of God. In other words, we know what we're saying!
1 Corinthians 2:12-13:
Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God.
Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
As we are spiritual, our level of understanding is at a fundamentally higher level than that of the unsaved. We are able to compare spiritual things.
1 Corinthians 2:14:
But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
If anyone disagrees with us, that is just a result of that person being spiritually discerned, as he cannot understand the things which are of God.
1 Corinthians 2:15:
But he that is spiritual judgeth all things, yet he himself is judged of no man.
As spiritual people, God has granted us the right to judge the unsaved.
1 Corinthians 2:16:
For who hath known the mind of the Lord, that he may instruct him? but we have the mind of Christ.
And this is the most important one: We have the Mind of Christ. So, if anyone disagrees with us, this automatically means he disagrees with Christ. As people with the Mind of Christ, we are right about everything by definition!